Alex Wulff
Published © GPL3+

MorseCard - A Tiny Telegraph Station

This small PCB lets you learn Morse code and communicate with friends. Set up a telegraph network in your very own home!

EasyFull instructions provided4 hours5,166

Things used in this project

Hardware components

I2C OLED
2 displays needed total. This Amazon pack comes with 2 displays, so only one order is needed
×2
Custom fabricated PCB
OSH Park Custom fabricated PCB
Board Link: https://oshpark.com/shared_projects/2ERUpeWB
×2
ATtiny84 SOIC-14
×2
Terminal Block 2-Pin
Only two blocks are needed - this pack comes with 100
×2
6mm Pushbutton
×6
Slide Switch SPDT
Only two switches are needed - this pack comes with 50
×2
1/8W 330 Ohm Resistor
These can be found for much cheaper elsewhere if you don't care about Prime shipping
×4
0805 LED
Same deal with the resistors. These can be found much cheaper elsewhere if you don't want free prime shipping.
×4
Speaker Wire - 100ft
×1
LiPoly Battery - 4.7V, any capacity
Basically any power source from 3v to 5v with a 2-Pin JST connector should work.
×2
2-Pin SMD JST
×2
1x6 Female or Male Headers
×2
Capacitor 10 µF
Capacitor 10 µF
Only needed for programming ATtiny
×1
Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
Only needed for programming ATtiny
×1

Software apps and online services

Autodesk Circuits.io

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Quadhands
Not mandatory but definitely helpful.

Story

Read more

Schematics

circuits.io

Code

GutHub

Credits

Alex Wulff

Alex Wulff

1 project • 51 followers
I'm an 18-year-old maker from Upstate New York. I love Arduino, embedded systems, 3D printing, and iOS development. www.AlexWulff.com
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